1667651076401 has 4 divisors (see below), whose sum is σ = 1672456987632. Its totient is φ = 1662845165172.

The previous prime is 1667651076383. The next prime is 1667651076409. The reversal of 1667651076401 is 1046701567661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1667651076401 - 2⁶ = 1667651076337 is a prime.

It is a super-4 number, since 4×1667651076401⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1667651076401.

It is not an unprimeable number, because it can be changed into a prime (1667651076409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2402955095 + ... + 2402955788.

It is an arithmetic number, because the mean of its divisors is an integer number (418114246908).

Almost surely, 2^{1667651076401} is an apocalyptic number.

It is an amenable number.

1667651076401 is a deficient number, since it is larger than the sum of its proper divisors (4805911231).

1667651076401 is an equidigital number, since it uses as much as digits as its factorization.

1667651076401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4805911230.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 1667651076401 in words is "one trillion, six hundred sixty-seven billion, six hundred fifty-one million, seventy-six thousand, four hundred one".